I usually used attack ninpo to kill the enemies because they would usually drop blue orbs to help refill your life bar anyways. Also in master ninja mode, the more enemies you killed, the better. Plus, red orbs are rare but when you do get them you can use the ninpo again to kill a few more enemies and get some more blue orbs.

Higher combo count also means more essence. I've seen an enemy drop a crapload of essence when I killed him, and my count was at 100+. Effect becomes noticable when you pass 10 hits, and it only increases from there on._________________

hehe i knew it was wrong but to lazy to search for the right name:P but its funny XD
btw what is an Kunoichi exactly ? I searched itbut i don't think its a woman you mean .... or do you..?_________________

I don't care about karma, I only care about the wood amulets, I'm actually on the fire caverns on head ninja, but It's dificulty is greatly increased compared to normal, and the critics were comenting about lack of dificulty, they obviously don't tried the head ninja mode XD, master ninja gonna kick my b4lls a bunch of times